Red Hat Product Security has rated this update as having Moderate securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Samba is an open-source implementation of the Server Message Block (SMB) orCommon Internet File System (CIFS) protocol, which allows PC-compatiblemachines to share files, printers, and other information.

A flaw was found in the way Samba handled ACLs on symbolic links.An authenticated user could use this flaw to gain access to an arbitraryfile or directory by overwriting its ACL. (CVE-2015-7560)

Red Hat would like to thank the Samba project for reporting this issue.Upstream acknowledges Jeremy Allison (Google) and the Samba team as theoriginal reporters.

All samba users are advised to upgrade to these updated packages, whichcontain a backported patch to correct this issue. After installing thisupdate, the smb service will be restarted automatically.

4. Solution:

Before applying this update, make sure all previously released erratarelevant to your system have been applied.